394 82* ltYDROCIfA.RlDACE.3r,, 



Order LXXXII. HYDROCHARIDACE^I. 



Sep. 3, herbaceous. Pet. 3, regular, coloured. Stam. epigy- 

 rious. Ovary solitary, inferior ; placentes parietal sometimes 

 projecting into the centre of the ovary. Stig. 3 6. Fr. dry, or 

 succulent, not bursting, 1- or spuriously many-celled. Seeds 

 many. Albumen 0. Embryo straight, cylindrical. No raphides. 



1. IlYtmocHARis, Dioecious. Cal. 3-parted. Pet. 3. Male 

 with 9 12 stamens in 3 rows surrounding 3 abortive styles. 

 Fern, with 3 abortive filaments and 3 fleshy scales sur- 

 rounding the 6 deeply bifid styles. Caps. 6-cerlled, many- 

 seeded. L. floating, orbicular. 



2. STRATIOTES. Dioecious. CaL 3-parted. Pet. 3. Male 

 with 12 or more stamens surrounded by many abortive ones. 

 Fern, with 6 deeply bifid styles, Berry 6-celled, many- 

 seeded. L, swordshaped. 



3. ANACHABJS. Dioecious. Fl. from tubular bifid spath. 

 Cal. 3-parted, Pet. 3, " Male. Sep. ovate-oblong. Pet. 

 linear or none. Stam. 9 ; filaments combined into a column 

 below." Fern, with a long filiform tube, 3 abortive fila- 

 ments and ligulate stigmas. Caps. 1-ceJled, few-seeded. 

 L. oval-oblong in whorls. 



1. HYDROCH'AKIS Linn. Frog- bit. 



1, H. Morsm-rdna (L<). - -# 808. R. vii. 62. Floating. 

 With runners bearing tufts of stalked roundish-reniforin entire 

 leaves. Fl. white, delicate, springing from a pellucid membra- 

 nous sheath. Seeds covered with beautiful prominent spirally 

 twisted cells. Ponds and ditches. P. VII. VIII. E. I. 



2. STRATIO'TES Linn. Water-Soldier. 



1. S. Aloides (L.) ; 1. swordshaped-triangular ciliate-spinous. 

 E. J?> 379. -R, vii. 61. Creeping in the mud. L. many, 

 rigid. Stalk compressed, 5 or 6 in. high, with two 1. near its 

 summit. Fl. white, delicate. The plant rises to the surface of 

 the water to flower, and sinks tfgain afterwards. -Fen-ditches 

 in the East of England; naturalized in Scotland and Ireland. 

 R VII. E. [S. I.] 



3. ANACH'AEIS Rich. Water-Thyme. 



*1. A. Alsinas'trum (Bab.) ; 1. 3 in a whorl oval-oblong blunt 

 serrulate, fein. fi. from a tubular bifid spath many times ex- 

 ceeding the sessile gernien, sep. and pet. broad nearly equal, 



